Power pump



Dec.

13, 1932. J. B. PICARD POWER PUMP Filed Dec. 24, 1929 INVENTOR V////////F /)T V///// Patented Dec. 13, 1932 .UNlTED STATES;

JOHN B. PICARD, OF TOLEDO, OHIO POWER rum? Application filed December 24, 1929. Serial No. 416,264. I

My invention relates to power pumps design-ed particularly for pumping into wells while they are being drilled slush or water laden with mud for the purpose of bringing to the surface of the ground the loose sand and chippings at the bottom of the well hole.

Slush pumps usually have a pump plunger rod connecting the cross-head of a power device to the plunger in the pump cylinder.

As the slush in the pump is driven under high pressure some of it which is laden with grit is forced past the plunger rod packing and engages the baflie carried by the plunger rod. The velocity of the liquid which engages the battle is so high that the liquid is converted into a spray or vapor in which the grit is suspended. This spray or vapor passes beyond the battle and toward the engine casing and some of it engages the plunger rod which carries it into the engine casing where it becomes mixed with the lubricant for the engine.

It is the object of this invention to provide a chamber into which the mud laden liquid or slush escapes past the packing in the end of the pump cylinder. The velocity of this liquid is dissipated in this chamber before it can reach the bafiie so that much of the sand and grit is removed before any of the liquid reaches the battle. Such mud as reaches the battle will move with such a slow velocity that it will not turn to spray, but will drip down and escape through drainage openings in the bottom of the machine frame.

Referring to the accompanying drawing, Fig. 1 is a vertical longitudinal section of a power driven pump embodying my invention, parts being broken away and parts being in side elevation; Fig. 2 is a similar view of a modification of my invention; and Fig. 3 is a vertical section on the line 33 on Fig. 2.

On the drawing, 1 designates the metal frame for the power pump. 2 designates the cross-head slidable in the chamber 3 of the 43 frame. 4 designates a pump plunger reciprocable in the pump cylinder or chamber 5. The plunger rod 6 operatively connects the cross-head 2 to the pump piston 4. 7 is a partition in the frame 59 1 through which the plunger rod 6 extends, the partition carrying the stufiing box 8 surrounding the plunger rod. 9 is a stuffing box in the end 10 of the pump cylinder, this stuffing box surrounding the plunger rod to prevent the passage of liquid from the pump cylinder into the chamber 11 in the pump frame. This chamber is separated from the chamber 12 in the frame by the partition 13 which is provided with a stufiing box 14 surrounding the plunger rod. The plunger rod carries with it in the chamber 12 the bafiledisk 15, the battle being in its right hand position as shown in full lines on the drawing when the plunger rod is at its right hand limit, and at the position shown in dotted l nes when the plunger rod is at its left hand limit. The chamber 12 with the baffle 15 is old, but it failed to prevent grit laden spray from reaching the plunger rod 6 at the left of the bafile because the end 10 of the pump cylinder was located about where the partition 13 is. The pressure of the piston upon the slush in the pump cylinder forced some ofthe 'slush beyond the packing and against the right hand face of the battle. Applicant has provided a chamber 11 between the pump cylinder and the battle for the purpose of receiving the grit laden slush escaping from the pump cylinder. In this chamber 11 the velocity of the spray is dissipated and whatever slush. adheres to the plunger rod in the chamber 11 and passes into the chamber 12 will have merely the velocity of the plunger rod and will not be converted into spray or vapor in the chamber 12, but will drip down from the bafile and the plunger rod at the right thereof and escape through openings in the bottom of the frame 1.

In Fig. 2, the chamber 12a, which corresponds to the chamber 12 in Fig. 1, and the end 10 of the pump cylinder are brought together so that the right hand end of the chamber 12a, occupies substantially the position that the partition 13 does in Fig. 1 when the partition 7 in F ig. 2 corresponds to the partition TinFig. l. 'Thestuifing box 9a carried by the end 10 of the pump cylinder is provided with a special gland having at its end nearest the bafile 15 the chamber 11a which corresponds to the chamber 11 in Fig. 1. The 9 plunger rod 6 passes centrally through this chamber which is annular in shape. This chamber has the port 16 at its upper side to receive water from the nozzle 17 supplied with water from the pipe 18 connected to any suitable source of water supply so as to cause a stream of water to flow through the port 16 and the annular chamber 11a with sutlicient volume and velocity to clear the plunger rod and the chamber from any of the slush which may have passed into the chamber. The water I with such slush as is picked up in the chamber 11a passes downwardly through the dis charge opening 19 and is drained away through the bottom of the framel. The chamber need not be limfted to the size and shape shown but may occupy more or less or all of the spaces between the plunger rod 6 and the interior wall of the frame 1.

' The chamber 11a is shown opening into the chamber 12a at both ends which would not be the case if the chamber were large enough to engage the top and bottom walls of the frame 1. The chamber 11a forms an expansion chamber like the chamber 11 in Fig. 1 to dissipate or expand the mud laden vapor or spray, the latter being washed away by water from the nozzle 17 The water admitted to the chamber 11a also forms a lubrieating agent for the plunger rod.

I claim:

1. In a power pump, a pump chamber, a. plunger therein, a power-transmitting means, a plunger rod connecting the plunger to the power-transmitting means, a packing for the plunger rod at the end of the chamber through which the rod reciprocates, a bafile on the rod, a chamber in which the baffle reciprocates with the rod, a chamber between the bafiie and the pump chamber to dissipate the velocity of any liquid escaping from the pump chamber past the packing, and means for washing the said fluid from the,

velocity dissipating chamber.

2. In a power pump, a pump chamber, a plunger therein, a second chamber, a power transmitting means therein, a plunger rod connecting the plunger and the said means, a packing for the rod in the end of the chamber, a third chamber between the first chamber and the said means, a battle carried by the rod in the third chamber, a fourth chamber in the third chamber and between the battle and the first chamber and surrounding the rod, and means for supplying a stream of washing fluid to the fourth chamber and in contact with the rod for washing foreign matter from the rod.

In testimony whereof, I hereunto aflix my signature.

JOHN PICARD. 

